Damon自锁托槽技术非拔牙矫治上下颌牙列拥挤的临床分析

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1、浙江人学硕jI：学位论文中文摘要还体现在前牙弓；并伴随有前牙的唇倾趋势。4、在第二恒磨牙未萌出之前，要尽早应用扩弓技术，有利于通过增加牙弓宽度减轻切牙唇倾程度。lV【关键词】D锄on自锁托槽，牙列拥挤，切牙唇倾度，牙弓宽度浙江入学硕J：学位论文．英文摘要Studyofthenon·extractioncrowdedcasestreatedwiththeDamonSelf-ligatingSystem．TheA伍1iatedStomat010百cHospital，CollegeofMedicalSciences，ZhejiangU．niVersityCa

2、ndidate氨玎MasterDe伊ee：huangchengyiSuper、，isor：Prefessor1iu1iAbStractobjectiVe：TbinVestigate吐1e仃eatmente丘IectofD锄onsystemusediIlIlon—eX仃actioncrowdingcases，c印halometricaIlalySisanddentalarchwidmmeaSuremeIltSwereconductedbeforea11daRerthetrea恤ent，锄dnlechallgescomparedbeforeaIldaRer

3、n．eatrnent．MaterialandMethods：Forty-似oconsecutiVely骶atedskeletalclassIcrowdingcaseswereincluded．Thiny-siXcasescrowdedinma)【i11aD，werediVidedintodi舵rent黟oupsaccordingt0spacediscr印ancy(SD)：groupU1(UpperarchSD<5mm，18c2Lses)，伊oupU2(UpperarchSD>5mm，18cases)．Ⅲrty-siXcausescrowdediIlma

4、ndibularwerediVidedintodif五胃entgroupsaCcordingtospacedisCr印ancy(SD)：groupL1(10werSD<5舢[n，18cases)，L2group(10werSD>5姗，18caSes)．Acco础ngtowh砒erⅡ1eemptionoft11esecondmolarOrnot，theU2伊oupwaSf．盯吐lerdiVidedintothesecondm01aremptiongroup(G1group，9cases)andsecondmolarrlo—eruptiongroup(G2

5、group，9cases)．BeforeandaRer仃ea锄entt11edent2L1arch、)I，idtllaIldthecephalometricmeasuremeIltswerec011ectedforeachgroupa11dthet』estw2Lst11encompared．CorrelationAnalysisaIldV浙江火学顺lj学位论义英文摘要RegressionaJlalysiswaSdonein0rdertostudyt11erelatedfactorsOfthecrowdingcases打eatedwiththeD锄ons

6、elfligatingsystem．Results：U1groupaRertreatment，thewidthbetweenthesecondm01ar(WU5)increasedby1．18mm，thewidmbetweentllefirstm01ar(WU6)i11creaSedby1．14mm．FortheU2伊oupaRertrea缸nent，WU4曲creaSedby2．41mm，WU5证creasedby2．43mm，WU6increasedby1．72瑚m．U1一NAincreasedby2．08mm．G1groupa丘ertreatme

7、nt，WU4i11creaSedby2．26m加，WU5iIlcreaSedby2．27mm．Wjm廿leG2group，aRer仃eatment，WU4increaSedby2．57mm，WU5increaSedby2．6111】m，WU6increaSedby2．0衄：11；U1·NAincreaSedby2．05mm．TheL1group，aRer仃eatment，increaSedcaninewidth(WL3)by0．76nm，t11ewidtllbeMeent11e缸stp崩n01ar(WL4)in盯eaSedby3．52m瑚，thewid

8、thbetweenthesecondpremolar(WL5)i11creaSedby2．39